Answer:
C ) 33 s.
Explanation:
In simple harmonic motion damping of amplitude is logarithmic which is expressed as follows

A/A₀ = .3 (given ) , b is damping constant and t is time which is 30 s here.

ln .3 = -b / 30
1.2 = b / 30
b = 36 s 0r 33 s
Answer: Accordingly, what is the difference between an epiphyseal plate and an epiphyseal line? The Epiphyseal plate contains cartilage used for producing bone. The Epiphyseal line is formed after the epiphyseal plate has stopped producing bone). The Periosteum is the covering of a bone.
Explanation:
Because of the earth surface and the interior of the earth decay into radioactive elements convective motion in the mantle